At 20:47 4/5/02, you wrote:
OK, I got interested and found a .ps file on the web for the USAF chart.
How big is it suppose to print out? Or should I just buy one from one of
the online sites?
Is the "40x the focal length" the standard way of using it? How do you
interpret the results?
Thanks!
This is not something you can print out and use with accuracy. It's there
so you can see what one looks like. To use the USAF 1951 chart for actual
lens tests, you can buy one from Edmund Optics (used to be part of Edmund
Scientific before they split into two companies):
http://www.edmundoptics.com/IOD/DisplayProduct.cfm?productid=1332
There may be other sources for it.
-- John
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